diff --git a/requirements.txt b/requirements.txt
index da3f383..f2b802c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,4 +14,5 @@ cryptography >= 1.8, < 3
 pyOpenSSL >= 16.0.0, < 17
 certifi >= 2015.11.20.1
 reportlab
-pytz
\ No newline at end of file
+pytz
+zeep
\ No newline at end of file